explain the output?

Question

#include <stdio.h>

int i=0;
int fun(int a){
i++;
if(a>99)
return a-12;
return fun(fun(a+25));
}
void main()
{

printf("%d",fun(69));
printf("%d",i);

}

Answer 1

this algorithm uses recursivity functions.
Look, in The first fun call, you're if is false, so, next line isn't executing.

a = 69, so , now is same function but this time 69 + 25 .

In this case, if is true, so the output to the first printf is a - 12 = 69 - 12 = 57.

For The next one, you've to add every time you begin fun() because i++.

The result for this print is 2.

I hope I explain It well:)